Kim K. fights back against cosmetic surgery rumors

Rumors about Kim Kardashian going under the knife have been revived once again.

Now that the 33-year-old is back in the spotlight and unafraid to show just how much she's slimmed down since delivering her daughter North in June, a report in Life & Style magazine has claimed that Kardashian had help from a cosmetic surgeon.

The story calls the reality star a "weight-loss cheater," and suggests that she didn't get back in shape with a commitment to Atkins and exercise, as she's said.

The magazine cites an anonymous source as saying that the new mom "has been getting work done, including fillers, stretch-mark treatments and a fat-reducing ultrasound procedure on her stomach." While this isn't the first time gossip about Kardashian has spread, it is one of the few times she's flatly denied it.

"I am very frustrated today seeing reports that I got surgery to lose my baby weight! This is FALSE," she tweeted on Wednesday. "I worked so hard to train myself to eat right & healthy, I work out so hard & this was such a challenge for me but I did it!!! I'm so proud of my accomplishment & NO ONE will take this away from me with fake reports! Say what u want about me but I work hard & am the most disciplined person u will ever meet!"